House prices vary from place to place and are usually high _____ there are famous schools.  

It was lack of money, not of effort, _________ defeated their plan. 

When you ______ at a restaurant, please order just enough food. 

There is much truth in the idea _        kindness is usually served by frankness.

I often think of the years ____ I worked with the foreigners, ____ has had a great effect on my later life.